module teapo.storage.attached.indexedDB {

​

  export class StorageDetect implements attached.StorageDetect {

​

    constructor(

      private _window: { indexedDB: IDBFactory; } = window) {

​

    }

​

    detect(

      uniqueKey: string,

      callback: (

        error: Error,

        metadata: attached.StorageDetect.BootState,

        access: StorageAccess) => void) {

​

      if (!this._window.indexedDB) {

        callback(new Error('No indexedDB object exposed from window.'), null, null);

        return;

      }

​

      if (typeof this._window.indexedDB.open !== 'function') {

        callback(new Error('No open method exposed on indexedDB object.'), null, null);

        return;

      }

​

      var dbName = uniqueKey || 'teapo';

​

      var openRequest = this._window.indexedDB.open(dbName, 1);

      openRequest.onerror = (errorEvent) => callback(wrapErrorEvent(errorEvent, 'detectStorageAsync-open'), null, null);

​

      openRequest.onupgradeneeded = (versionChangeEvent) => {

        var db: IDBDatabase = openRequest.result;

        var filesStore = db.createObjectStore('files', { keyPath: 'path' });

        var metadataStore = db.createObjectStore('metadata', { keyPath: 'property' });

      };

​

      openRequest.onsuccess = (event) => {

        var db: IDBDatabase = openRequest.result;

​

        var transaction = db.transaction('metadata');

        transaction.onerror = (errorEvent) => callback(wrapErrorEvent(errorEvent, 'detectStorageAsync-openRequest.onsuccess-transaction'), null, null);

​

        var metadataStore = transaction.objectStore('metadata');

​

        var editedUTCRequest = metadataStore.get('editedUTC');

        editedUTCRequest.onerror = (errorEvent) => {

          // TODO: editedUTC is not there

          callback(null, /* meta */ null, /* access */ null);

        };

​

        editedUTCRequest.onsuccess = (event) => {

          callback(null, /* meta */ null, /* access */ null);

        };

​

      };

​

    }

​

  }

​

}